Automatic analysis apparatus

An automatic analysis apparatus of an embodiment includes a holder, a first dispenser, a second dispenser, a detector, a memory, and processing circuitry. The holder movably holds a plurality of reaction vessels. The first dispenser dispenses an analyte into each of the reaction vessels. The second dispenser dispenses a reagent into the reaction vessel. The detector detects light transmitted through the reaction vessel. The memory stores a test order. The processing circuitry controls the holder, the first dispenser, and the second dispenser based on the test order. The processing circuitry determines one of the reaction vessels to be used for measuring the analyte based on the test order, and performs control to collect characteristic data from another of the reaction vessels not used for measuring the analyte while the analyte is measured.